Glow-lamp support and reflector.



G. H. SHARP.

GLOW LAMP SUPPORT AND REFLECTOR.

APPLICATION PILBI MAR, 25, 1910.

1,31; Patented May2, 1911 2 SHEETSSHEET 1 o i/ ww we zgfi I v 2 v 51 31 1 xcjattoznizq G. H. SHARP.

GLOW LAMP SUPPORT AND REFLECTOR. 4

APPLICATION FILED MAR.25, 1910.

Patented May 2, 1911.

2 SHEETS-SHEET 2.

, 3 vwe Wfoz at are;

CLAYTON H. SHARP, OF WHITE PLAINS, NEW YORK.

GLOW-LAMP SUPPORT AND REFLECTOR.-

Specification of Iletters Patent.

Patented May 2 1911.

aglpplication filed March 25, 1910. Serial No. 551,460.-

To all Qbhdm it mey coacem:

I to

the form of mutilated paraboloid frusta sea mutilated paraboloid frustum.

cured together and intersecting, and sup ported from a casing in which are disposed the glow lamp and .circuit connections.

The invention consists in the combinations more particularly set forth in the claims.

In the accompanying drawings-Figure l is a top view of my lamp support and reflectors. Fig. 2 is an end elevation; Fig. 3 is an enlarged section on the line m, w, of Fig. 1. Fig. 4 is a section on. the line y, y, of Fig. 1.

parts.

1 and 2 are reflectors, each in the form of I Said frusta are united at their smaller ends, as indicated at the line 3, Fig. 3, and at the place of junction is made an opening 4, through which opening passes the shank of a glow lamp 5, which lamp is supported in vertical position with its central axis in the common focus of the two reflectors. The mutilation of each paraboloid frustum con sists in omitting a portion of the wall of each reflector on the lowerside. By reason of this conformation of the reflectors and of the placingof the lamp, the light rays from the lamp are projected downward and horizontally, thus adapting the device especially for street illumination.

On the upper side of the reflectors 1, 2 is secured a metal ring 6 having in its inner periphery projections 7. Surrounding said ring is a metal protective sleeve 8. 9 is a casing, also of metal, having a lower cylindrical portion 10 and an upper frusto-conical portion 11. The cylindrical portion 10 of thecasing fits in the ring 6, and a shoul der 12 formed 011 the exterior of said casing, above said cylindrical portion, then rests upon the upper edges of the ring 6 and sleeve 8. In the lower edge of the cylindrical portion 10 are recesses which fit over the projections 7, so that said projections 7 prevent the reflectors and easing from turn- Similarnumbers of reference indicate like ing one upon the other Through the cylindrical part 10, ring 6 and sleeve 8, are made openings which receive the screws 13 which connect the parts together, so that the reflectors are supported from the casing. Projecting opposite to one another from. the inner sides of the casing 9 are two bars 14, 15, to the under side of which is secured an annular disk 16 of insulating material. On the under side of the disk are bolted spring clip armsl'T, 18 which are opened upwardly to extend through the aperture in the disk and through the space between the projecting bars 14:, 15. To these barsare secured the terminals of the insulated supply conductors 19, 20, which pass through bushings 20, 21 in the walls of the casing. Said bushings may also be of insulating material.

On the outside of the casing and just above the bushings 20, 21 are projecting arms 22, 23, having concavities on their under side to extend over said bushings and terminating in cylindrical portions 24, 25. 011 said cylindrical portions are similar blocks 26, 27 of insulating material, each having an annular groove to recelve the wire 28 by means of which the supply conductors 19 and 20 are fastened to said blocks. The blocks may be secured in place on the arms 22 and H8) by washers and keys, as shown.

In the upper fiat portion, of the casing is a threaded aperture which receives the exter nally threaded metal sleeve 29, by means of which sleeve the block 30 of insulatin material is secured to said casing. The lock 30 is tubular, and in its upper portion reeeives a threaded sleeve 31 which is seated at its lower portion in the body of the block, so that a shoulder is formed at The enlarged aperture above the shoulder receives the threaded end of the supporting tube33, Fig. 2, which may depend from a ceiling or from any suitable lamp post, or other support.

The glow lamp 5 is of any desired construction and is provided with a metal shank 34, on the end of which is a plate 35 of insulat-ing material,.through which plate passes the spring terminals 36 which, within the shank 3 1, are to be connected in any suitable way to the ends of the lamp filament.

In placing the lamp in the device, the terminals 36 and shank 3d are inserted through the opening until the late 35 takes a bearing against the under si e of the disk 16, and

clip arms l7, l8 and there by reason or t bending oi -"said arms, become ei'ig d. and held, thus detachably supporting the lamp in position. lihcn (:lmvnward pull is :zortod on the lamp to remoie it, the spring clip arms 17, 18 open inthe usual Way.

It is to be noted, first, that the whole dcvice is suspended from the supporting tube' sale, a reflector for electric lamps comprising a glow lamp in the common focus of two semi-paraboloid reflectors having an opening at their intersection, a dome secured to said reflectors directly above and closing said opening, and suspension means on said dome. I

2. As a new article of manufacture and sale, a reflector'for electric lamps comprising two scmi-pz'iraboloid reflectors having an opening at their intersection, a dome secured to said reflectors directly above and closing said opening, suspension means on'said dome, and means within said dome for supporting said reflectors.

3. The combination of a plurality oi intersecting semi-paraboloid reflectors having an open ng at their intersection, a domeshaped casing secured to said reflectors above said opening, means centrally disposed on said casing for suspending said casing and reflectors, a glow lamp socket within said casing, and circuit connections leading to said socket.

seiner The combination of a plurality of in lersecting scmi-paraboloid reflectors having an opening at their intersection,a ring flange surrcruiding said opening, a dome-shaped casing, means for securing said flange to the rim oi? said casing, means centrally disposed on said casing it'or suspending said casing and reflectors, a glow lamp socket Within said casing, and circuit connections leading to said socket.

' 5. The combination of a plurality of intersecting semi-paraboloid reflectors having an opening at their intersection, aring flange surrounding said opening, a dome-shaped casing, means for securing said flange to the rim of said casing, means centrally disposed on said casing for sus ending said casing and reflectors, a glow amp socket within said casing, arms extending outwardly from said casing, and circuit conductors secured to said arms and leading to said socket through openings in the Wall ofsaid casin 6. As a new article of manufacture and sale, a reflector for electric lamps comprising two reflectors, each being substantially half of a surface of revolution, said reflectors having an opening at their intersection, a dome secured to said reflectors directly above and closing said opening, and suspension means on said dome.

7. As a new article'of manufacture and sale, a reflector for electric lamps comprising two reflectors, each being substantially half of a surface of revolution, said reflectors having an opening at their'intersection, a dome secured to said reflectors directly above and closing-said opening, suspension means-on said dome, and means Within said dome for supportin a glowlamp in the common focus of said reiiect-ors.

In testimony whereof I have aflixed my signature in presence of two Witnesses.

CLAYTON H. SHARP.

Witnesses Gnn'rn'oop ll, PORTER, Mar T, McGARnY. 

